Enable display compression (DSC v1.2) for 1080x2400 Visionox
VTDR6130 AMOLED DSI panel. DTS property is needed to enable DSC.
Default configuration is video mode + non-DSC for any back
compatibility.
Below modes works on SM8650. While cmd mode does not work yet.
- video mode + DSC
- video mode
- cmd mode + DSC
Signed-off-by: Jun Nie <jun....@linaro.org>
---
.../gpu/drm/panel/panel-visionox-vtdr6130.c | 58 ++++++++++++++++++-
1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
index 540099253e1b..d6c44816cdd0 100644
--- a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
+++ b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
@@ -9,6 +9,7 @@
#include <linux/of.h>
#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
@@ -17,9 +18,12 @@
struct visionox_vtdr6130 {
struct drm_panel panel;
+ struct drm_dsc_config dsc;
struct mipi_dsi_device *dsi;
struct gpio_desc *reset_gpio;
struct regulator_bulk_data supplies[3];
+ bool cmd_mode;
+ bool dsc_enable;
};
static inline struct visionox_vtdr6130 *to_visionox_vtdr6130(struct drm_panel
*panel)
@@ -49,12 +53,20 @@ static int visionox_vtdr6130_on(struct visionox_vtdr6130
*ctx)
if (ret)
return ret;
+ if (ctx->dsc_enable)
+ mipi_dsi_dcs_write_seq(dsi, 0x03, 0x01);
+
mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0x00,
0x00);
mipi_dsi_dcs_write_seq(dsi, 0x59, 0x09);
mipi_dsi_dcs_write_seq(dsi, 0x6c, 0x01);
mipi_dsi_dcs_write_seq(dsi, 0x6d, 0x00);
- mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
+
+ if (ctx->cmd_mode)
+ mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x02);
+ else
+ mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
+
mipi_dsi_dcs_write_seq(dsi, 0x70,
0x12, 0x00, 0x00, 0xab, 0x30, 0x80, 0x09, 0x60,
0x04,
0x38, 0x00, 0x28, 0x02, 0x1c, 0x02, 0x1c, 0x02,
0x00,
@@ -205,6 +217,26 @@ static const struct drm_display_mode
visionox_vtdr6130_mode = {
.height_mm = 157,
};
+static int visionox_vtdr6130_enable(struct drm_panel *panel)
+{
+ struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct drm_dsc_picture_parameter_set pps;
+ int ret;
+
+ if (!dsi->dsc)
+ return 0;
+
+ drm_dsc_pps_payload_pack(&pps, dsi->dsc);
+ ret = mipi_dsi_picture_parameter_set(dsi, &pps);
+ if (ret) {
+ dev_err(&dsi->dev, "Failed to set PPS\n");
+ return ret;
+ }
+
+ return 0;
+}
+
static int visionox_vtdr6130_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
@@ -228,6 +260,7 @@ static const struct drm_panel_funcs
visionox_vtdr6130_panel_funcs = {
.prepare = visionox_vtdr6130_prepare,
.unprepare = visionox_vtdr6130_unprepare,
.get_modes = visionox_vtdr6130_get_modes,
+ .enable = visionox_vtdr6130_enable,
};
static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl)
@@ -260,12 +293,32 @@ static int visionox_vtdr6130_probe(struct mipi_dsi_device
*dsi)
{
struct device *dev = &dsi->dev;
struct visionox_vtdr6130 *ctx;
+ struct drm_dsc_config *dsc;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
+ ctx->cmd_mode = of_property_read_bool(dev->of_node, "enforce-cmd-mode");
+ ctx->dsc_enable = of_property_read_bool(dev->of_node, "enable-dsc");
+
+ /* Set DSC params */
+ if (ctx->dsc_enable) {
+ dsc = &ctx->dsc;
+ dsc->dsc_version_major = 0x1;
+ dsc->dsc_version_minor = 0x2;
+ dsc->slice_height = 40;
+ dsc->slice_width = 540;
+ dsc->slice_count = 2;
+ dsc->slice_per_pkt = 1;
+ dsc->bits_per_component = 8;
+ dsc->bits_per_pixel = 8 << 4;
+ dsc->block_pred_enable = true;
+
+ dsi->dsc = dsc;
+ }
+
ctx->supplies[0].supply = "vddio";
ctx->supplies[1].supply = "vci";
ctx->supplies[2].supply = "vdd";
@@ -306,6 +359,9 @@ static int visionox_vtdr6130_probe(struct mipi_dsi_device
*dsi)
return ret;
}
+ dev_err(&dsi->dev, "discovered with %s mode %s\n",
+ ctx->cmd_mode ? "cmd" : "video",
+ ctx->dsc_enable ? "and DSC enabled" : "");
return 0;
}
--
2.34.1
